2 câu trả lời
`x - 3/10 = 7/15 . 3/5`
`x - 3/10 = 21/75 = 7/25`
`x = 7/25 + 3/10 = 28/100 + 30/100`
`x = 58/100 = 29/50`
$\text{x - $\dfrac{3}{10}$ = $\dfrac{7}{15}$ . $\dfrac{3}{5}$}$
$\text{x - $\dfrac{3}{10}$ = $\dfrac{7}{25}$}$
$\text{x = $\dfrac{7}{25}$ + x - $\dfrac{3}{10}$ }$
$\text{x = $\dfrac{29}{50}$ }$
$\text{Vậy x = $\dfrac{29}{50}$ }$
Câu hỏi trong lớp
Xem thêm